Re: [Buildroot] [PATCH v2,1/1] package/libraw: fix CVE-2023-1729

From: "Yann E. MORIN" <yann.morin.1998@free.fr>
To: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Cc: buildroot@buildroot.org
Subject: Re: [Buildroot] [PATCH v2,1/1] package/libraw: fix CVE-2023-1729
Date: Sun, 17 Sep 2023 14:48:12 +0200	[thread overview]
Message-ID: <20230917124812.GU415981@scaer> (raw)
In-Reply-To: <20230917115139.21621-1-fontaine.fabrice@gmail.com>

Fabrice, All,

On 2023-09-17 13:51 +0200, Fabrice Fontaine spake thusly:
> A flaw was found in LibRaw. A heap-buffer-overflow in raw2image_ex()
> caused by a maliciously crafted file may lead to an application crash.
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> ---
> Changes v1 -> v2:
>  - Fix title typo

*This one* is the patch I applied! ;-)

Regards,
Yann E. MORIN.

>  ...shrink-flag-for-3-4-component-images.patch | 24 +++++++++++++++++++
>  package/libraw/libraw.mk                      |  3 +++
>  2 files changed, 27 insertions(+)
>  create mode 100644 package/libraw/0001-do-not-set-shrink-flag-for-3-4-component-images.patch
> 
> diff --git a/package/libraw/0001-do-not-set-shrink-flag-for-3-4-component-images.patch b/package/libraw/0001-do-not-set-shrink-flag-for-3-4-component-images.patch
> new file mode 100644
> index 0000000000..ef93e0901b
> --- /dev/null
> +++ b/package/libraw/0001-do-not-set-shrink-flag-for-3-4-component-images.patch
> @@ -0,0 +1,24 @@
> +From 477e0719ffc07190c89b4f3d12d51b1292e75828 Mon Sep 17 00:00:00 2001
> +From: Alex Tutubalin <lexa@lexa.ru>
> +Date: Sat, 14 Jan 2023 18:32:59 +0300
> +Subject: [PATCH] do not set shrink flag for 3/4 component images
> +
> +Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> +Upstream: https://github.com/LibRaw/LibRaw/commit/477e0719ffc07190c89b4f3d12d51b1292e75828
> +---
> + src/preprocessing/raw2image.cpp | 2 ++
> + 1 file changed, 2 insertions(+)
> +
> +diff --git a/src/preprocessing/raw2image.cpp b/src/preprocessing/raw2image.cpp
> +index e65e2ad7..702cf290 100644
> +--- a/src/preprocessing/raw2image.cpp
> ++++ b/src/preprocessing/raw2image.cpp
> +@@ -43,6 +43,8 @@ void LibRaw::raw2image_start()
> + 
> +   // adjust for half mode!
> +   IO.shrink =
> ++	  !imgdata.rawdata.color4_image && !imgdata.rawdata.color3_image &&
> ++	  !imgdata.rawdata.float4_image && !imgdata.rawdata.float3_image &&
> +       P1.filters &&
> +       (O.half_size || ((O.threshold || O.aber[0] != 1 || O.aber[2] != 1)));
> + 
> diff --git a/package/libraw/libraw.mk b/package/libraw/libraw.mk
> index b6616f0c10..cbd509cfea 100644
> --- a/package/libraw/libraw.mk
> +++ b/package/libraw/libraw.mk
> @@ -18,6 +18,9 @@ LIBRAW_DEPENDENCIES = host-pkgconf
>  LIBRAW_CXXFLAGS = $(TARGET_CXXFLAGS)
>  LIBRAW_CONF_ENV = CXXFLAGS="$(LIBRAW_CXXFLAGS)"
>  
> +# 0001-do-not-set-shrink-flag-for-3-4-component-images.patch
> +LIBRAW_IGNORE_CVES += 0001-do-not-set-shrink-flag-for-3-4-component-images.patch
> +
>  ifeq ($(BR2_PACKAGE_JASPER),y)
>  LIBRAW_CONF_OPTS += --enable-jasper
>  LIBRAW_DEPENDENCIES += jasper
> -- 
> 2.40.1
> 
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